Fire alarm



March 22, W, Ey (3R-OMER A FIRE ALARM .Filed Jan. 27, 1952 MBCROMER y/QzD/v ATTORNEY Patented Mar. 22, y 1932 UN lil'llrDy STAT ES il WILLIAM B. 01310311513@` F FORT .WORTHJ TEXAS FIRE ALARM Applicatonfled January 27.1932. Serial No. 589,225.

My invention relates -to lire alarms, and more particularly to a fire alarm of the gong or bell type; and the object is to construct an y alarm which is simple in construction and positive in operation. Another object is to provide an alarm for this purpose which is very sensitive, and which requires no attention. An advantage'of this invention is that the structure may be made in a neat compact form` which is inexpensive to manufacture.

Other objects and advantages will be fully explained in the following description, and

the invention will be more particularly pointed out in the claims. Reference is had to the accompanying drawings which form a part of this application.

Fig. 1 is a perspective view of the lire alarm.

Fig. 2 is a vertical section .of the same.

Fig. 3 is a plan view of the alarm, showing the cover removed from themechanism.

Similar characters of reference are used to indicate the same partsthroughout the several views.y

The invention consists of a base 1 upon which is mounted bells 2 and mechanism for sounding the bells when the clapper is vreleased. The pair of bells 2 are supported on the base 1 by upright bars 3 which are made rigidwith the base 1. A clapper orhaminer 4; is pivotally mounted on the base 1 and so positioned onthe base as to oscillate between the bells 2 when actuated by the spring mechanism.

Y The mechanism for actuating the clapper 4 consists of a spring 5, one end of which is attached to the inner periphery of a spring housing or cap 6 and the other end of the spring is attached to ashaft 7. The shaft 7 is provided with a gear wheel 8 rigidly attached thereto and adapted to mesh with and drive a pinionQ. A frame 10 is mounted on the base 1, and servesas a bearing for one end of the shaft 7, and the other end of the shaft is journaled in the base 1. The springy housing is journaled. on the shaft 7 and interposed between the frame yl() and the gear wheel 8.

The pinion'9 is provided with a shaft 11 made rigid therewith and journaled in the base 1 and the frame 10. An escapement wheel 12 is made rigid with the shaft 11 and adapted to actuate the clapper or hammer 4c 55' by means of its escapement 13. vWhen the spring y5 liswound the clapper ,or hammer is caused to oscillate between the pair of bells 2 and strike the bells ina similar manner as used in kan alarm clock. This mechanism for actuating the hammer is covered by a lid 14 which fits over the frame 10 and supported on the base 1. An opening 1() is provided in the side of the lid for free movement of the clapper 1. The upper portion of the 65 spring housing or cap 6 is provided with upwardly projected lugs 15 and a 4dog 16 is journaled on the frame 10, and positioned so as toengage these projections or lugs and keep the housing from turning Iexcept in one direction. A handle 17 is made` integralwithy the vhousing 6 for manually winding they spring 5.V The shaft 7 telescopes into the shaft 18 of the cap or housing 6 and the handle 17 is made rigid with the shaft -18 vand the hous- 75 ing 6 for winding the spring 5.

The head of the hammer 4 is provided with an elongated eXtension'lQ which is made rigid with the head 2O and projects outwardly therefrom to approximately theheight of the upright bars 3 which hold the bells 2. This extension 19 may be a screw which projects through the head 2O of the clapper or hammer t. An inflammable bar or retainer member 21 is suspended between the bells 2 and held in position by the outer ends of the upright bars 3. An opening 22 is provided in the bar 21 approximately midway of the bars 3 for receiving the projection 19. Whenthe member is positioned on the bells 2 so that the op-en- 7 ing 22 receives themember 19'the clapper 4 is held against movement by the mechanism.` The member or bar 21 consists of inflammable material so that a fire will cause destruction of the bar and release the clapper 1 for sounding the alarm. The bar or member 21 may be made of any size or shape7 preferably of such shape as to form an ornamental design for the alarm.

When the spring 5 is wound and the inflammable member' or bar 21 is placed on the bells 2 so as to hold the clapper 4 inoperative, the mechanism is set to sound the lire alarm as soon as the bar 2l is burnt to such an extent as to release the clapper 4. New members or bars 2l may be replaced for further alarms.

Various Ichanges may be made in the size, shape, and arrangement of the parts of the mechanism Without departing from the spirit of my invention.

What I claim is:

l. In an automatic lire alarm provided with a base and a pair of bells mounted thereon, a hammer pivotally mounted on said base and adapted to strike said bells, a springdriven mechanism for actuating said hammer, and an inflammable bar carried by said bells and adapted to hold said bells inoperative.

2. In an automatic fire alarm provided with a base, a pair of bells journaled on said base, a bell hammer pivotally mounted on said base and interposed between said bells, an escapement provided on said hammer, a springdriven mechanism mounted on said base and adapted to actuate said escapement and said hammer, and an inllammable bar mounted on said bells and adapted to hold said hammer inoperative.

3. In an automatic fire alarm provided with a base and bells mounted thereon, a bell hammer pivotally mounted on said base and provided with an escapement on one end thereof, a spring driven mechanism mounted on said base and adapted to actuate said hammer and escapement, a projection rigidly mounted on said hammer, and an inflammable bar mounted on said bells and adapted to engage said projection for holding said hammer inoperative. t

4. In an automatic fire alarm provided with a base and a pair of bells mounted thereon, a hammer pivotally mounted on said base and interposed between said bells, said hammer provided with an escapement on the end thereof and made rigid therewith, a springdriven mechanism for actuating said escapement for causing said hammer to strike said bells, a projection made rigid with the head of said hammerand proj ect-ing at right angles thereto, and an inflammable member carried by said bells and adapted to engage said projection for holding said hammer inoperative.

In testimony whereof, I set my hand, this 12th day of January, 1932.

WILLIAM B. CROMER. 

